[Y]ou and especially civilisation are in grave danger. [...] [A]s the century progresses, the temperature will rise 8 degrees centigrade in temperate regions and 5 degrees in the tropics. [...] Much of the tropical land mass will become scrub and desert, and will no longer serve for regulation; this adds to the 40 per cent of the Earth's surface we have depleted to feed ourselves. [...] [B]efore this century is over billions of us will die [MF: Sure, before the end of the century most of us will be dead, and the remaining ones will be at least 94 years old] and the few breeding pairs of people that survive will be in the Arctic where the climate remains tolerable. [...] The worst will happen and survivors will have to adapt to a hell of a climate.Survivors will live in a hell of a climate, but still a tolerable one. Those are going to be tough girls and guys. What will they do during the torrid six-month long Arctic nights? A lot of breeding, no doubt.
The article by James Lovelock is published in The Independent of the UK. I have spared you the heavy Gaia rhetoric.